This was fun to do!
I took a still picture of Marvin and used the lasso tool to trace around his arm. Then I cut and pasted to make a new object (the arm). I duplicated it twice, and used the Transform tool to rotate each duplicate 10 degrees - one clockwise, one counterclockwise. I erased the pole he was holding and replaced it with the sword.
I made him blink by making a couple black oval eyelids. The teeth are borrowed from you-know-where... The horns and the sword I made with Ulead COOL 3D. The head he's bouncing? Well, you have to join and visit the PIRC Bulletin Board to find out! (See the link to PIRC on the Links page.) Or, click this link for a biased version of the events...